Invert drilling fluids and methods of drilling boreholes
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C09K-008/36
C09K-008/02
E21B-021/00
출원번호
UP-0633703
(2006-12-05)
등록번호
US-7534743
(2009-07-01)
발명자
/ 주소
Kirsner, Jeff
Siems, Don
Burrows Lawson, Kimberly
Carbajal, David
Robb, Ian
Jamison, Dale E.
출원인 / 주소
Halliburton Energy Services, Inc.
대리인 / 주소
Roddy, Craig W.
인용정보
피인용 횟수 :
15인용 특허 :
117
초록▼
Methods for drilling, running casing in, and/or cementing a borehole in a subterranean formation without significant loss of drilling fluid are disclosed, as well as compositions for use in such methods. The methods employ drilling fluids comprising fragile gels or having fragile gel behavior and pr
Methods for drilling, running casing in, and/or cementing a borehole in a subterranean formation without significant loss of drilling fluid are disclosed, as well as compositions for use in such methods. The methods employ drilling fluids comprising fragile gels or having fragile gel behavior and providing superior oil mud rheology and overall performance. The fluids are especially advantageous for use in offshore wells because the fluids exhibit minimal differences between downhole equivalent circulating densities and surface densities notwithstanding differences in drilling or penetration rates. When an ester and isomerized olefin blend is used for the base of the fluids, the fluids make environmentally acceptable and regulatory compliant invert emulsion drilling fluids.
대표청구항▼
What is claimed is: 1. A method for drilling in a subterranean formation comprising: providing or using an invert emulsion drilling fluid comprising: a continuous phase; an internal phase; an emulsifier; a weighting agent; and 0 to about 3 pounds per barrel of organophilic clay, wherein the drilli
What is claimed is: 1. A method for drilling in a subterranean formation comprising: providing or using an invert emulsion drilling fluid comprising: a continuous phase; an internal phase; an emulsifier; a weighting agent; and 0 to about 3 pounds per barrel of organophilic clay, wherein the drilling fluid: has a G'10/G'200 elastic modulus greater than about 2, suspends the weighting agent when stresses or forces associated with drilling are reduced or removed from the drilling fluid, and produces substantially no pressure spike upon resuming stopped drilling, as detected by pressure-while-drilling equipment or instruments. 2. The method of claim 1 wherein the continuous phase comprises at least one component selected from one of the groups consisting of: (i) esters prepared from fatty acids and alcohols, esters prepared from olefins and fatty acids or alcohols; (ii) olefins comprising linear alpha olefins, isomerized olefins having a straight chain, olefins having a branched structure, isomerized olefins having a cyclic structure; olefin hydrocarbons; (iii) paraffin hydrocarbons comprising linear paraffins, branched paraffins, poly-branched paraffins, cyclic paraffins, isoparaffins; (iv) mineral oil hydrocarbons; (v) glyceride triesters comprising rapeseed oil, olive oil, canola oil, castor oil, coconut oil, corn oil, cottonseed oil, lard oil, linseed oil, neatsfoot oil, palm oil, peanut oil, perilla oil, rice bran oil, safflower oil, sardine oil, sesame oil, soybean oil, sunflower oil; (vi) naphthenic hydrocarbons; and (vii) combinations thereof. 3. The method of claim 2 wherein the continuous phase comprises an internal olefin. 4. The method of claim 2 wherein the continuous phase is substantially ester-free. 5. The method of claim 2 wherein the continuous phase comprises an ester and an olefin. 6. The method of claim 1 wherein the drilling fluid further comprises a modified fatty acid rheology modifier. 7. The method of claim 1 wherein the drilling fluid further comprises a copolymer filtration control agent. 8. The method of claim 1 wherein the drilling fluid further comprises a rheology modifier comprising dimeric and trimeric fatty acids. 9. The method of claim 1 wherein the drilling fluid further comprises a methylstyrene/acrylate filtration control agent. 10. The method of claim 1 wherein the drilling fluid comprises organophilic clay present in an amount in the range from greater than 0 to about 3 pounds per barrel. 11. The method of claim 1 wherein the drilling fluid comprises organophilic clay present in an amount from about 1 to about 3 pounds per barrel. 12. The method of claim 1 wherein the drilling fluid is substantially free of lignite. 13. The method of claim 1 wherein the drilling fluid is substantially free of an organophilic filtration control agent. 14. The method of claim 1 wherein the drilling fluid is used in the temperature range of from about 40° F. to about 120° F. 15. The method of claim 1 wherein the drilling fluid has a lower yield point at a temperature of about 40° F. than at a temperature of about 120° F. 16. The method of claim 1 wherein the drilling fluid substantially maintains a difference in measured surface density and equivalent circulating density downhole of less than 0.5 ppg during drilling. 17. The method of claim 1 wherein the drilling fluid is used offshore. 18. The method of claim 1 wherein the drilling fluid is tolerant to drill cuttings. 19. The method of claim 1 wherein the drilling fluid does not exhibit significant sag when at rest. 20. The method of claim 1 wherein the drilling fluid is used in drilling a well with loss of the drilling fluid being less than about 1 barrel per barrel of hole drilled. 21. The method of claim 1 wherein the drilling fluid is used in running casing and cementing with loss of the drilling fluid being less than about 100 barrels of total drilling fluid. 22. The method of claim 1 wherein the drilling fluid is used in drilling, running casing and cementing with loss of the drilling fluid being less than about 500 barrels of total drilling fluid. 23. The method of claim 1 wherein the drilling fluid further comprises a thinner. 24. The method of claim 1 wherein the drilling fluid further comprises a thinner that reduces the viscosity of the drilling fluid at about 40° F. to a greater extent than it reduces the viscosity of the drilling fluid at about 120° F. 25. The method of claim 1 wherein the drilling fluid further comprises one or more additives selected from the group consisting of an emulsion stabilizer, a viscosifier, an HTHP additive, and a water activity lowering material. 26. The method of claim 1 wherein the drilling fluid has a yield point less than about 3 Pa at a shear rate of 3.0 s-1 or less. 27. The method of claim 1 wherein the drilling fluid has a Stress Build Function greater than about 3.0. 28. The method of claim 1 further comprising drilling, running casing and/or cementing a wellbore in the subterranean formation. 29. A method for drilling in a subterranean formation comprising: providing or using an invert emulsion drilling fluid comprising: a continuous phase; an internal phase; an emulsifier; 0 to about 3 pounds per barrel of organophilic clay, wherein the drilling fluid: has a G'10/G'200 elastic modulus greater than about 2, has substantially no sag when stresses or forces associated with drilling are reduced or removed from the drilling fluid, and produces substantially no pressure spike upon resuming stopped drilling, as detected by pressure-while-drilling equipment or instruments. 30. The method of claim 29 wherein the continuous phase of the drilling fluid comprises at least one component selected from one of the groups consisting of: (i) esters prepared from fatty acids and alcohols, esters prepared from olefins and fatty acids or alcohols; (ii) olefins comprising linear alpha olefins, isomerized olefins having a straight chain, olefins having a branched structure, isomerized olefins having a cyclic structure; olefin hydrocarbons; (iii) paraffin hydrocarbons comprising linear paraffins, branched paraffins, poly-branched paraffins, cyclic paraffins, isoparaffins; (iv) mineral oil hydrocarbons; (v) glyceride triesters comprising rapeseed oil, olive oil, canola oil, castor oil, coconut oil, corn oil, cottonseed oil, lard oil, linseed oil, neatsfoot oil, palm oil, peanut oil, perilla oil, rice bran oil, safflower oil, sardine oil, sesame oil, soybean oil, sunflower oil; (vi) naphthenic hydrocarbons; and (vii) combinations thereof. 31. The method of claim 30 wherein the continuous phase of the drilling fluid comprises an internal olefin. 32. The method of claim 30 wherein the continuous phase of the drilling fluid is substantially ester-free. 33. The method of claim 30 wherein the continuous phase of the drilling fluid comprises an ester and an olefin. 34. The drilling fluid of claim 29 wherein the drilling fluid comprises a weighting agent. 35. The method of claim 29 wherein the drilling fluid further comprises a modified fatty acid rheology modifier. 36. The method of claim 29 wherein the drilling fluid further comprises a copolymer filtration control agent. 37. The method of claim 29 wherein the drilling fluid further comprises a rheology modifier comprising dimeric and trimeric fatty acids. 38. The method of claim 29 wherein the drilling fluid further comprises a methylstyrene/acrylate filtration control agent. 39. The method of claim 29 wherein the drilling fluid comprises organophilic clay present in an amount in the range from greater than 0 to about 3 pounds per barrel. 40. The method of claim 29 wherein the drilling fluid comprises organophilic clay present in an amount from about 1 to about 3 pounds per barrel. 41. The method of claim 29 wherein the drilling fluid is substantially free of lignite. 42. The method of claim 29 wherein the drilling fluid is substantially free of an organophilic filtration control agent. 43. The method of claim 29 wherein the drilling fluid is used in the temperature range of from about 40° F. to about 120° F. 44. The method of claim 29 wherein the drilling fluid has a lower yield point at a temperature of about 40° F. than at a temperature of about 120° F. 45. The method of claim 29 wherein the drilling fluid substantially maintains a difference in measured surface density and equivalent circulating density downhole of less than 0.5 ppg during drilling. 46. The method of claim 29 wherein the drilling fluid is used offshore. 47. The method of claim 29 wherein the drilling fluid is tolerant to drill cuttings. 48. The method of claim 29 wherein the drilling is performed in a wellbore in the subterranean formation at a water depth greater than about 1,500 feet. 49. The method of claim 29 wherein the drilling fluid is used in drilling a well with loss of the drilling fluid being less than about 1 barrel per barrel of hole drilled. 50. The method of claim 29 wherein the drilling fluid is used in running casing and cementing with loss of the drilling fluid being less than about 100 barrels of total drilling fluid. 51. The method of claim 29 wherein the drilling fluid is used in drilling, running casing and cementing with loss of the drilling fluid being less than about 500 barrels of total drilling fluid. 52. The method of claim 29 wherein the drilling fluid further comprises a thinner. 53. The method of claim 29 wherein the drilling fluid further comprises a thinner that reduces the viscosity of the drilling fluid at about 40° F. to a greater extent than it reduces the viscosity of the drilling fluid at about 120° F. 54. The method of claim 29 wherein the drilling fluid further comprises one or more additives selected from the group consisting of an emulsion stabilizer, a viscosifier, an HTHP additive, and a water activity lowering material. 55. The method of claim 29 wherein the drilling fluid has a yield point less than about 3 Pa at a shear rate of 3.0 s-1 or less. 56. The method of claim 29 wherein the drilling fluid has a Stress Build Function greater than about 3.0. 57. The method of claim 29 wherein the drilling fluid is used in drilling, running casing and/or cementing a wellbore in the subterranean formation.
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